Toothbrush



FIG. 1 is a front perspective view from above and one side of the design;

FIG. 2 is the front view of the design;

FIG. 3 the view of the other side of the design;

FIG. 4 is the rear elevational view of the design;

FIG. 5 is a plan view of the design; and,

FIG. 6 the underneath plan view of the design. 

The ornamental design for a toothbrush, as shown and described. 